Blindstitch sewing-machine.



No. 721.079. PATENTED'PEB. 11,1903. L. ONDERDONK. BLINDSTITOH SEWING MACHINE.

APPLICATION FILED NOV. '7, 1899.

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No. 721,079. 'PATENTBD FEB. 17, 1903.

L. ONDERDONK.

BLINDSTITGH SEWING MACHINE.

, APPLICATION FILED NOV. 7, 1899.

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APPLICATION FILED NOV. 7, 1899.

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- L. ONDERDONK. BLINDSTITGH SEWING MAGHINE.

APPLICATION FILED NOV. 7, 1899.

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UNITED STATES PATENT OFFICE.

LANSING ONDERDONK, OF NEW YORK, N. Y., ASSIGNOR TO THE UNION SPECIAL SEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF ILLINOIS.

BLINDSTITCH SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 721,079, dated February 17, 1903.

' Application filed November 7, 1899. Serial No. 736,129. (No modeli) To all whom it may concern:

Be it known that I, LANSING ONDERDONK, a citizen of the United States, residing at New York, in the county of New York, State of New York, have invented certain new and useful Improvements in Blindstitch Sewing- Machines, of which the following is a description, reference being had to the accompanying drawings and to the letters and figures of reference marked thereon.

My invention relates to'an improvement in sewing-machines, and particularly to a machine of the single or double chain-stitch variety adapted for the purpose of blindstitching. I

I have heretofore filed an application for Letters Patent of the United States, Serial No. 711,025, filed March 25, 1899, showing and describing a machine of the kind above referred to, but claiming principally a looper movement therefor.

The present application embodies features shown but not claimed in the aforesaid applicationfeatures relating especially to the construction of the machine as a whole; and the present invention consists in various matters, such as hereinafter described, and referred to in the appended claims.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a front side elevation of a blindstitch sewing-machine embodying my invention. Fig. 2 is a rear side elevation of the same. Fig. 3 is a detail perspective view of the specific connections between the loopersupporting rod or bar and its operating-pitman. Fig. 4: is a detail view of the loopersupporting bar or rod. Fig. 5 is a front end View of Fig. 1. Fig. 6 is a detail View showing a mechanism for positively'raising and lowering the looper-supporting bar or rod as it oscillates between its extremities of movement. Fig. 7 is a sectional plan view of a sewing machine embodying my invention, and Fig. 8 is a detail view illustrating the mechanism for clamping the bed-plate in its working position. Fig. 9 is a detail view of the needle and the removable rib or guide over which the goods are crimped.

It will be understood that I do not herein describe specifically or claim the feeding mechanism, as that forms the subject-matter of another application filed on the 31st day of July, 1902, Serial No. 117,078.

In the drawings, A represents the main standard or base of the machine, upon which is formed the upwardly and forwardly projecting arm or gooseneck B.

0 represents the work-plate of the machine,

which as herein shown is hinged at D to the standard A in order to swing down to allow of the work being put in plate. The mechanism for dropping the work-plate is shown in Figs. 1, 2, 7, and 8 and is as follows: The hinge is shown at D, being a pintle or rod passed through a part of the bed-plate and at its ends fitting in lugs a on the standard, the cylinder being provided on its inner end with the part b, the lower end of which is provided with a lug through which passes the pintle for the'hinge D. An operating handle or lever 0 is pivoted on the rod or pintle and carriesa cam-piece d, which in one movement of the handle or lever c presses against the beveled end e of the part?) and forces and holds the bed-plate into position. A stopscrew f is provided for limiting the extent of upward movement of the bed-plate O, the periphery of said cylinder in its upward movement coming in contact with said stop-screw.

While I have herein shown the cylinder or bed plate 0 as hinged to the standard or base of the machine,it will be understood that I do not wish to be limited to this particular arrangement nor to other arrangements set forth in the specification by way of illustration, for various minor modifications and changes may be made without departing from the spirit of the invention.

In the machine herein shown E is the main or driving shaft of the machine,which is transversely arranged with respect to the axis of the bed-plate O and is supported insuitable hearings in the lugs 12. While the particular feed mechanism does not form a part of the present application;1.do desire in connection with the feature of the hinging of the cylinder to claim, broadly, such a connection between the feed-operating shaft and the driving-shaft as will allow of this dropping of the cylinder without destroying the connections,or at any rate without destroying them to such an extent that on the cylinder or bed-plate being returned to operative position the connections will not be again restored. For this reason, therefore, I shall briefly describe the feedingmechanism.

Between the two bearings of the main shaft E are secured two universal eccentrics g h, which operate two upright connections t' It, the lower end of the connection '5 being secured by ball-and-socket connection to the horizontal lever Z. This lever l is firmly secured to a transverse shaft m, which operates in lug-bearings on the front side of the machine-standard and is provided at its forward end with a slotted cross-head, into which is fitted the head of the bolt "12. On the bolt n and against the outside face of 0 is a ballsleeve 19, held firmly against 0 by a thumbnut q. Around the ball-sleeve p is secured one end of the connecting-lever s. The other end of the connecting-lever s is secured by a ball-and-socket connection to the cranksleeve 15, which is firmly secured to one end of the feed-shaft u. The eccentric connection 11, connecting through the lever Z, shaftp, provided with slotted cross-head, bolt n, ballsleeve 1), connecting rod 3, connecting to crank-sleeve 25, &c., form a ball-and-socket connection and arrangement of parts through which a conveniently-adjustable reciprocating movement is imparted to the feed-shaft it during a revolution of the eccentric g, se-

cured to the shaft E. It is the reciprocation of shaft to that determines the length of the stitch, the variation of oscillation of the shaft 11. being elfected by the adjustment of connecting-rod 8 through the parts '11, p q, in part 0, to and from the center of the transverse shaft m. The lower end of connection is secured by ball-and-socket arrangement to the bell-crank lever w, the same as g and Z.

The bell-crank levercc is secured to the base of the machine by means of a transverse shaft m, having free bearing in lugs extending from the rear side of the machine-base, the lugs being represented at y y. To the lower end of a: is secured the connecting-rod s by a ball-and-socket connection vertically adjustable in the slot in at, substantially the same as the adjustment between 1) and s. The other end of s has a ball-and-socket connection with a crank-sleeve w, which is firmly secured to the feed-shaft u, through which connection with the driving-shaft E an oscillatory motion is imparted to it. It is this shaft it which by its connection with the feed-dog imparts to it its up-and-down motion. The object of making an adjustable connection between the leverm and connecting-rod s is for the purpose of increasing or diminishing at will the up-and-down movement of the feed-dog, which is particularly desirable in a machine of this kind, to meet the variations in thickness and nature of material to be sewed. Also by the ball-andsocket connection of parts it will be seen that the work-support or cylinder 0 may be dropped or raised more or less without affecting the action of the shafts u u, Therefore the feed-dog and the connecting parts will not bind. Thus far the description relates to the universal and adjustable connection between the driving-shaft E and the feed-shafts u u in the bed-plate of the machine, and the action of the other parts will not be particularly referred to.

The driving-shaft E has at its inner end the belt wheel or pulley 3 and at its opposite end the balance-wheel 4. This balance-wheel 4 has projecting from it a lug, into which is screwed a ball-stud 5. A two-part split head 6, formed with a socket into which the ball of the stud extends, has a screw -thread into which is fitted one end of the pitman-rod 7, which at its opposite end is screwed into one end of a sleeve 8, and into the opposite end of the sleeve is screwed another pitman-rod having a ball-and-socket and clamp connection (marked, as a whole, 9) with the upper end of the needle-lever, which is pivoted, as at 10, to the frame of the machine. This needle-lever carries on its lower end a curved needle, which needle preferably has a point ground on one side, as shown at 11, this arrangement being desirable in order to carry the needle close to the guide 12, removably secured upon the bed-plate, and over this guide the goods are bent or crimped and presented to the needle. The needle shown is curved, and therefore moves in the arc of a circle, entering and emerging from the fabric above the cloth-plate and upon opposite sides of the central line of a scam.

I do not claim in this application the arrangement of the needle and its operating means, as that is covered in my other application abovc referred to; but I do herein claim the bed-plate provided with the removable rib or guide, as 12, over which the goods are bent.

The looper in the present application, as in my application above referred to, is mounted upon an inclined oscillating looper-supporting bar and is supported entirely above the bed-plate of the machine. This looper-supporting bar is oscillated by the means shown,

in Figs. 2, 3, and 5, as follows: Screwed into a lug on the belt-wheel 3 is a stud having a ball on its outer end fitted within the socket in the head 13, which has a universal movement by reason of said ball-and-socket connection. Attached at one end to this head is a pitman 14;, which at its opposite end is screwed into the end of a sleeve 15, to which is connected another pitman 16, which at its opposite end is provided with a head having a socket which fits over a ball on the end of a stud 17, screwed into the end of the arm 18 of the swinging frame 19, sleeved upon a pivotbolt 20, secured upon the upper portion of the machine-head. Projecting from this sleeve 19 is another arm 21, having a clamp 22 at its end clamped around a head 23 on the upper end of the forked stud 24. Between the forks of the stud 24 is pivoted the end of a link 25, which at its opposite end is pivoted between the forks 26 of a bolt 27, pivoted in the end of a plate 28,which at its opposite end receives and clamps by a set-screw the upper end of the looper-supporting bar 29, which at its lower .end carries the curved looper G. This particular looper movement is not herein specifically claimed, as it forms the subject-matter of another application filed by me on the 7th day of November, 1899, Serial No.

The pivotal arrangement of the arm 21 with the forked stud24 and the link with the forked stud 27 allows the oscillatory movement of the looper to take place, while the pivoting of the link 25 at one end between the forks 24 and at the other end between the forks 26 allows an upward movement of the looper-supporting bar to provide for lifting the looper over the raised portion of the throat-plate or any ridges or seams in the goods, and this movement is, as shown in Fig. 5, imparted to it by the needle-lever, which throughthe pivoted link 30 permits this upward movement.

Another arrangement for giving the upward movementto the looper-supporting bar is illustrated in Fig. 6, in which the looper-supporting bar is provided with a block 31 and a roller 32, which roller is embraced by fork 33,

carried by an angle-lever 34, pivoted to the.

machine-frame, which angle-lever is oscillated by a ball-and-socket and pitman connection 35 to the balance-wheel 4.

Having thus described my invention, what I claim, and desire to secure by Letters Patout, is

1. In a sewing-machine, the combination of suitable stitch-forming mechanism including a needle reciprocating from side to side of the line of the seam, a looper cooperating therewith to form stitches, an overhanging frame supporting the needle and looper, a work-support arranged below the needle and looper and movable toward and from said stitchforming mechanism to allow the insertion and removal of the work and a feeding mechanism carried by the work-support; substantially as described.

2. In a sewing-machine having a suitable work-support, a feeding mechanism carried thereby, a needle reciprocating from side to side of the line of the seam, and a looper cooperating therewith to form stitches, a driving-shaft, connections between the drivingshaft and the feeding mechanism, said needle and looper being arranged above the worksupport, said work-support being movable toward and from the stitch-forming mechanism to allow the insertion and removal of the work, without breaking the connections between the driving-shaft and feeding mechanism, and means for adjusting the work-support with respect to the stitch-forming mechanism; substantially as described.

3. In a blindstitch sewing machine, the combination of suitable stit-chforming mechanism, including a needle reciprocating from side to side of the line of the seam, a looper cooperating therewith to form stitches, a

work-support arranged below the needle and looper, and pivoted upon an axis transverse to the machine-frame to allow the insertion and removal of the work with means for holding it in raised position, and a feeding mechanism contained within the movable worksupport and movable therewith; substantiallyas described.

4. In asewing-machine, an adjustable worksupport, and an overhanging arm or head, a driving-shaft, stitch-forming mechanism arranged above the work-support, a feeding mechanism carried by the work-support, and movable therewith, and free joint connections between the driving-shaft and the feed mechanism; substantially as described.

5. In a sewingmachine, a pivoted worksupport and an overhanging arm or head, a

driving-shaft, stitch-forming. mechanism arranged above the work-support, a feeding mechanism carried by the work-support, and free joint connections between the drivingshaft and the feeding mechanism, whereby the work-support may be moved away from the stitch-forming mechanism; substantially as described.

6. In a sewingmachine having suitable stitch-forming mechanism including a needle reciprocating from side to side of the line of the seam, and a looper cooperating therewith to form stitches, an overhanging frame supporting the looper and needle operating mechanisms, a horizontal work-support pivoted to the standard and extending parallel with the overhanging frame and supporting at its outer end the feeding mechanism, means for crimping the goods in which the stitches are formed, an element of said crimping means being carried on the work-support; substantially as described.

7. In a blindstitch sewing-machine, the combination of suitable stitch-forming mechanism, including a needle reciprocating from side to side of the line of the seam, a looper cooperating therewith to form stitches, a presser-foot, a work-support arranged below the needleand looper and pivoted upon an axis transverse to the. machine-frame to allow of the insertion and removal of the work with means for keeping it normally in raised position,a feeding mechanism carried by the work-support, and a ridge-forming rib also carried by the work-support, and over which the goods are fed; substantially as described.

8. In a sewing-machine, provided with a suitable bed-plate or support for the material to be sewed, a vibrating needle and a vibrating looper cooperating therewith to form stitches, both said needle and looper being arranged to operate entirely above said bedplate or support, said bed-plate or support having movement toward and away from the stitch-forming mechanism, and means for adjusting the bed-plate or support to vary the bight of the needle into the goods, said bedplate being provided with a removable rib or guide over which the material to be sewed is creased, substantially as described.

9. In a blindstitch sewing-machine, the combination of suitable stitch-forming mechanism, including a needle reciprocating from side to side of the line of the seam, a looper cooperating therewith to form stitches, a presser-foot, a work-support arranged below the needle and looper, and pivoted to swing up or down to allow of the insertion and removal of the work, with means for holding it in its raised position, a feeding mechanism carried by said work-support and movable up and down with the latter, and a ridgeforming rib also carried by the work-support, and

over which the goods are fed; substantially as described.

10. In a sewing-machine comprising a vibrating needle, and a vibrating looper cooperating therewith to form stitches, a suitable feeding mechanism and a hinged work-support within which the feeding mechanism is supported, and means for adjustably limiting the upward movement of said support; substantially as described.

11. In a sewing-machine, a standard, a bed or work plate, pivoted on said standard, a shaft or rod journaled on said standard, a cam carried by said rod or shaft adapted to bear against a clamping-face carried by the bedplate, and a lever for operating said cam substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

LANSING ONDERDONK.

Witnesses:

W. L. SWIFT, W. H. MOYER. 

